SAM YANG 909 POWER TUNE MODIFICATION PHOTOS

Enlarging the transfer port hole on the air tube for the larger transfer port using a 12mm slot drill

Side view of new bigger transfer port hole

Machining the larger transfer port slot in the receiver cover with 12mm slot drill

close up of the enlarges transfer port slot

enlarging the air passage from 6mm to 8mm using the 8mm drill

Enlarging the air passage from 6mm to 8mm using the 8mm drill

Showing how deep the 8mm drill must go to open up the air passage from 6mm to 8mm

These are the photos of the machine work required to install the Power Tune kit in the Sam Yang 909 Big Bore Airguns